I didn't know it was on AP all the way.
It was until the speed reduced to 108kts and the aircraft was about to stall.
However I don't think that diving to best glide from 700 ft would have resulted in better range.
Try it in a simulator it makes a significant difference.
I always thought all airliners train 'loss of all engines'. Best glide obviously depends on weight.
We do but usually from altitude where variations of speed are less critical and with far more time and distance to judge the descent profile.
If it happens on short final, your speed isn't going to make a difference, you will *never* make it to the runway (unless you're in a glider a/c of course).
I know for a fact that it has been done in a simulator (made the runway that is).
Sitting here we do of course have a luxury that was not afforded to the unlucky crew i.e. time and detailed analysis. For that reason it would be unfair and foolish to criticise them directly or indirectly. My statements are made with that qualification.